/** Split a group name into normalized hierarchy segments. */
export declare function splitSampleGroupPath(groupName: string, separator: string): string[];
/** First normalized hierarchy segment, used as the reorderable family key. */
export declare function getSampleGroupMajorPrefix(groupName: string, separator: string): string;
/** Normalized path above a concrete leaf group. */
export declare function getSampleGroupParentPath(groupName: string, separator: string): string;